Process for manufacture of flexible polyurethane foams with cyanic acid derivatives

US4258141A · kind A · utility

Assignee

• BASF SE

Inventors

• Wolfgang Jarre · Ludwigshafen, DE
• Gerhard Mueller · Freilassing, DE
• Otmar Zipp · Osnabrück, DE
• Eckhard Ropte

Key dates

• Filing date: Apr 10, 1979
• Grant date: Mar 24, 1981
• Expiry date: Apr 10, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention concerns a process for the manufacture of flame resistant flexible polyurethane foams by reacting a mixture of diphenylmethane diisocyanates and polyphenylene polymethylene polyisocyanates having a functionality greater than 2 containing 40 to 90 percent by weight diphenylmethane diisocyanate based on the total weight of said mixture; polyols, cyanic acid derivatives such as cyanamide, dicyandiamide, guanidine, biguanidine, melamine, cyanuric alkyl esterhydrazides and -amides as flame inhibitors, and blowing agents; as well as, possibly, chain extenders and other additives. The flexible polyurethane foams are suited for the familiar areas of applications, but especially as sound-insulation material for the construction industry.